Portable power driven tool



May 30 1939. N. A. LoPEz 2,160,274

PORTABLE POWER DRIVEN TOOL Filled OCl. 8, 1936 2 Sheets-Shea?l l fg i;a? E 4MM Maf May 30, 1939. N. A. LOPEZ PORTABLE POWER DRIVEN TOOL FiledOct. 8, 1936 2 Sheets-Sheet 2 Patented May 30, 1939 UNITED STATES PATENTOFFICE Claims.

This invention relates to portable power driven tools such as drills,saws, grinders, polishers, and the like.

It is the principal purpose of this invention to 5 provide a toolsupporting frame, such for example as a drill frame, having thereon apower translating mechanism and means for attaching a tool thereto,which frame has means for radially mounting and removing a motor todrive the tool.

In the use of portable tools of the character above referred to, it isnot economical to employ a separate complete tool for each purposebecause of the expense involved in providing motors and gears and powertranslating units for each tool such as a saw or a grinder or a drill.

In the present invention, I have provided a frame which is readilyadapted to support a power translating mechanism, a tool chuck, a toolguide, and a work engaging member as a general as- 20 sembly. the framebeing provided with means whereby a motor can be quickly attached to ordetached from the frame. The tool guide and the work engaging member areremovably mounted upon the frame which desirably is made up of a powertranslating unit and tool attaching chuck as one part with a handle andmotor mounting section as another part.

'Ihe invention further contemplates certain novel improvements in thetool guide and work engaging mechanism which are particularly adapted tofacilitate the application of such tools as drills to work of differentshapes.

The features and advantages of the invention will become more apparentfrom the following description, reference being had to the accompanyingdrawings wherein a preferred form of the invention is shown. It is to beunderstood, however, that the drawings and description are i1-lustrative only and are not to be taken as limit- 40 ing the inventionexcept in so far as it is limited by the claims.

In the drawings- Fig. l is a side view partly in section of a portabletool embodying the invention;

Fig. 2 is a side view taken substantially on the line 2 2 of Fig. lshowing the tool guide and Work engaging member removed from theframework;

Fig. 3 is a sectional view substantially on the 50 line 3-3 of Fig. 2;

Fig. 4 is a sectional View on the line 4--4 of Fig. 2;

Fig. 5 is a sectional view on the line 5-5 of Fig. 1;

Fig. 6 is a fragmentary side view partly in section showing the parts inthe upper portion of Fig. 1 in a changed position.

Fig. 7 is a side view showing the work engaging member turned at anangle to the axis of the drill.

Referring now in detail to the drawings, the invention is shown asapplied to a portable drill structure although it is obvious that it isnot limited to drills as many other types of tools may be just asreadily used.

The device embodies a back frame member I0 which carries a powertranslating mechanism II secured on the back frame member I by means ofscrews I2. This power translating mechanism may comprise a speedreducing gear or other suitable mechanism such as the mechanism forchanging the rotary motion of a motor to a reciprocating motion for sawsor les and the like. The power translating unit II has a connectingshaft I3 provided with a socket to receive a shaft I4 of a motor I5, theconnecting shaft I3 being provided with slots I6 to receive a pin I1 toestablish a driving connection from the motor I5 to the powertranslating device II. In the form of the invention shown, the powertranslating device Il has a sleeve I8 through which a shaft I9 (see Fig.3) projects to a chuck 2l] that is adapted to grip a work tool such asthe drill 2|. A suitable thrust bearing 22 may be interposed between thechuck 2i! and the sleeve I3.

The motor I5 is readily detachable from the other mechanism. It isprovided with a plate 23 secured by screws 24 to the motor housing. Thisplate has its side edges undercut as indicated at 25 and 26 and isslidable longitudinally in a groove 2'I provided in the back framemember IIJ. The plate 23 has a lip 28 at the rear end thereof which lipis adapted to seat against a shoulder 29 on the end of the back framemember I0 when the motor is pressed into driving position as shown inFig. l. The back frame member IU has a longitudinally running rib 3i)thereon. An L-shaped handle piece SI has a portion 32 which is U-shapedin cross section adapted to embrace the rib 30. The portion 32 ispivoted to the rib 3l) by means of a pin 33. The rib 30 has an aperture34, and the portion 32 of the handle 3| is apertured as indicated at 35so that, when the portion 32 is pressed down on the rib 3Q in theposition shown in Fig. l and Fig. 5, a lock pin 36 can be passed throughthe apertures 34 and 35 to lock the handle 3l in the position shown inFig. 1. In this position, a shoulder 3l on the handle extends downbehind the lip 28 on the plate 23 and across the groove 2T therebylocking the motor I5 firmly in operating position.

A tool guide and work supporting mechanism indicated generally by thenumeral 38 is secured upon the sleeve I8. A block 39 carries a channelbar 49 which has its flanges 4I and 42 cut out as indicated at 43 and 44(see Fig. 2) to receive the sleeve I8. A second channel bar 45 has itsflanges 46 and 4I also cut out as indicated at 48 to receive the sleeveI8, The two bars 40 and 45 are clamped upon the sleeve I8 by screws 49and 5G. The block 39, as shown, comprises a metal plate which is bent atthe sides to provide a pair of spaced guides 5I and 52 adapted toslidably receive rods 53 and 54. The guides 5I and 52 are formed bybending the block 39 into substantially circular form at its oppositeside edges. Near their lower edges, the portions 5! and 52 are providedwith screws 55 to which springs 55 are secured, the upper ends of thesprings 56 being secured to screws 5T in the rods 53 and 54. The springs55 are under tension tending to pull the rods 53 and 54 downwardly asindicated in Fig. 1.

The rods 53 and 54 carry a plate 58 at their lower ends. This plate hasa flat portion 59 extending toward the axis of the drill 2i and anupstanding rear portion 6D extending parallel to the axis of the drill2|. A drill guide 6I is rotatably mounted on the top of the portion 29by means of a pivot pin 82. A spring pressed pin 63 extends through theupstanding portion 60 of the plate 58 and engages notches 64 in thedrill guide plate 6I to hold the drill guide in any adjusted position.The pin S3 has a collar 65 thereon. A coiled spring 66 is interposedbetween the collar and the portion E0 of the plate 58. A knurled handle(il is provided on the pin 53 in order that it may be drawn away fromthe notches 54 in the drill guide 6I. A work engaging member 68 isSecured to the plate 58. The work engaging member has a horizontallyextending portion 69 and a mounting portion 'I9 extending up parallel tothe portion 69 and guided thereby. The mounting portion 'i9 has avertically running slot 1I. A screw 'F2 passes through the slot II andis threaded into the portion to secure the work engaging member inposition against the plate 58. It will be noted that the slot 'II alsoextends down vertically around the pin 63 so that the pin 63 and thescrew 'I2 together normally form a guide which prevents angular movementof the member 68 about the screw I2 as a pivot.

The member 68 can be raised and lowered, however, by sliding the screw'I2 and the pin 63 vertically in the slot 'II. The slot II has a pair ofcurved portions 'I3 and 'I4 (see Fig. 2 and Fig. 7) which permit themember 68 to be turned at an angle to the axis of the drill about thescrew 'I2 as a pivot when the member 68 is lowered to its loweredposition. The slots 13 and 'I4 provide passages to receive the pin 63 inthis position of the member E8.

For purposes of accurately setting the angle at which the member 68 isturned, a suitable scale of angles may be provided at l5 on theupstanding portion Ill of the member 68, The horizontal portion 69 ofthe member 68 is bent upwardly to provide V-shaped portions I5 and "Il,the upper extremities of which are on a line intersecting the axis ofthe drill 2! and running parallel to the upstanding portion 'i9 of themember 68. Between the portions 'I6 and TI, the member B8 is cut away toprovide an opening large enough to permit the tool guide 6I to extenddown between these portions. This is clearly indicated in Fig. 1. Ashaft or angularly shaped piece of work can thus be positioned in theV-shaped portions 'l5 and 'I'I and held solidly during the drillingoperation. The outer edges of the portions 'I6 and 'Il are bevelled asindicated at 'I8 and 'I9 on an angle of 45 degrees to the horizontal sothat the member 68 can be fitted into a corner as illustrated in Fig. 2to accurately position the drill for drilling holes in a corner.

Thus the single work engaging member 63 can be used for a great varietyof work making it unnecessary to change from one work engaging member toanother. 'I'he tool guide 5l cooperates with the work engaging member toaccurately position the drill close to the work and thus avoid breakageof drills which might otherwise occur.

In the event that it is desired to use the portable tool frameconsisting of the back frame member I9 and the handle 3| for a differenttype of work, the power translating device I I can be replaced with adifferent type such as a higher speed or lower speed with little or nodiiculty. The motor I5, of course, can be very readily transferred fromone frame to another making it unnecessary to have more than one motorfor several tools.

From the above description, it is believed that the construction andoperation or" this device will be readily apparent to those skilled inthis art.

Having thus described one specific form of my invention, what I claim asnew and desire to secure by Letters Patent is:

1. A tool supporting frame of the character described comprising a backframe member, means on said back frame member adapted to removably mounta motor, a power translating mechanism secured to said back frame memberhaving a shaft provided with means to couple it with a motor shaft, ahandle member movably connected to said back frame member, said handlemember having means adapted in one position of the handle member tocooperate with the back frame member in securing a motor thereto, andmeans for locking said handle member in said last named position, saidpower translating mechanism having a tool receiving chuck thereon, and atool guide frame fixed to said power translating mechanism and havingguide means for the tool spaced from said chuck.

2. A tool supporting frame of the character described comprising a backframe member, means on said back frame member adapted to removably mounta motor, a power translating mechanism secured to said back frame memberhaving a shaft provided with means to couple it with a motor shaft, ahandle member movably connected to said back frame member, said handlemember having means adapted in one position of the handle member tocooperate with the back frame member in securing a motor thereto, andmeans for locking said handle member in said last named position, saidpower translating mechanism having a tool receiving chuck thereon, and atool guide frame xed to said power translating mechanism and havingguide means for the tool spaced from said chuck, said tool guiding framehaving a work engaging member adjustably mounted thereon.

3. A portabl-e tool supporting frame of the character describe-dcomprising a back frame member, a tool holding chuck supported from saidback frame member, connecting mechanism carried by said back plate forconnecting a motor shaft in driving relation to said chuck, said backframe member having means to mount a motor thereon, and a handle membercarried by the back frame member and having means to lock the motor inoperative position on the back frame member, a tool guide frame carriedby said back frame member, a Work engaging member carried by said lastname-d frame, and a tool guide member carried by said last named frame,said Work engaging member being adjustable toward and away from the toolguide.

4. In a portable tool supporting frame of the character described, atool guiding and Work engaging frame comprising a mounting block havingmeans to secure it to the tool supporting frame, said block having meansto slidably mount a pair of rods thereon, a pair of rods slidablymounted on said block, a tool guide fixed to said rods, said tool guidecomprising a plate to which the ends of said rods are fixed, a rotatabletool guide pivoted on said plate, said plate having a turned-up portionextending parallel to said rods, said tool guide having peripheralnotches, and a spring pressed lock pin extending through said turned-upportion to engage said notches.

5. In a portable tool supporting frame of the character described, atool guiding and workengaging frame comprising a member having opposedclamping means adapted to receive a portion of the tool supporting frametherebetween, a rod slidably mounted in said member for movement towardand away from the tool supporting frame, a mounting plate fixed to saidrod, a tool gui-de adjustably mounted on said plate on the side thereoftoward the tool supporting frame, and a work-engaging member secured tosaid plate on the opposite side from the tool guide, said work-engagingmember including a pair of V-shaped sections separated by an openingadapted to receive the tool guide, said V-shaped sections having theiroutside edges bevelled at an angle of 45 to the face of theWork-engaging member.

NICOLAS A. LOPEZ.

